Rack for indexing-machines.



PATENTBD MAR. 14, 1905.

J. J. BURKE. RACK FOR INDEX ING MACHINES.

APPLICIATION FILED JULY 1, 1904.

Gttozmsy Patented March 14, 1905.

PATENT OEEIcE.

JOHN J. BURKE, OF CINCINNATI, OHIO.

RACK FOR lNDEXlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 784,658, dated March 14, 1905.

Application filed July 1 1904. Serial No. 214,855.

To (tZZ whom it may concern:

Be it known that I, JOHN J. BURKE, a citizen of the United States of America, and a resident of Cincinnati, county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Racks for Indexing-Machines,of which the following is aspecifieation.

My invention relates to a rack for regulating the step-by-step feed of the table which carries the books to be cut for the indices.

The object of my invention is a rack of this character which may be changed readily to adapt it for use in cutting varying-sized indices. This object is attained by the means described in the specification and illustrated in the drawings, in which- Figure 1 is a perspective view of a rack embodying my invention with only so much of the index-machine shown as is necessary to understand my invention. Fig. 2 is a perspective view of the rack embodying my invention. Fig. 3 is a detail view of the key for clamping the teeth in the rack. Fig. 4 is a transverse sectional view of the rack upon an enlarged scale. Fig. 5 is a detail perspective view of one of the end blocks of my rack. Fig. 6 is a similar view of. one of the teeth. Fig. 7 is a similar view of one of the spacingblocks. Fig. 8 is a detail perspective view of the stop-block for checking the forward movement of the table at any predetermined point.

Referring to the parts, the rack A is to be secured firmly to the table, which carries the book to be indexed in a step-by-step movement beneath the cutting-knife to cut the index edge of the book in a well-known manner, such as shown in United States Letters Patent No. 360,330 to Charles Seybold. Upon the table a constant pressure is exerted either by weight or by spring, tending to feed it forward. This forward motion is checked by means of a pawl or dog 6, carried by a bellerank lever B, which is pivoted at 7) and has its arm coupled to a rod If, whose upper end passes through a bracket Z)" and is pressed outward normally by a spring Z2 in the path of a cam b, mounted upon a constantly-rotating shaft 6 so that the upper end of the rod 1) is intermittently contacted by the cam to allow the arm 5 to raise the dog I) and to allow the table to be carried forward one step. The parts thus far described are of ordinary construction and need not be more specifically described.

The rack embodying my invention consists of a bar at, having cut in it a longitudinal tapered way a, the taper flaring outward in the bottom of the way. Upon one side of the way is placed a key C, which has dowel-pins a c, which pass through perforations a upon the side of the way at, so that the key C may be moved to be more or less closely in contact with the side of the way, so as to limit its size. The movement of the key C is regulated by means of set-screws c Adapted to fit the way a are a series of teeth D, having tapered bases (Z to engage the 1 way. The teeth are made, preferably, uniform in size. In conjunction with the teeth I use a series of spacing-blocks E, which are formed in a shape similar to the base (5 of the teeth, but have no part which projects up above the upper surface of the bar a like the parts (2 of the teeth I). At the ends of the racks I have placed end blocks F F, which are perforated to receive thumb-screws ff. I make use likewise of an enlarged spacingbloek G, which I place in the rack adjacent to the end block F.

It is seen that with my construction a rack may be formed in which the space between the teeth may be made of any size desired, so that irregular indexing may be carried on with an easy change upon the same rack. If an unusually large space is desired, all that is necessary is to place several of the spacingblocks E between one tooth and the next adjacent tooth. After the teeth and the intervening blocks have been placed in the way a by removing one of the end blocks F or F and have been adjusted to the points desired they are clamped in position by means of the key C and the set-screws c. It is therefore necessary to have only one rack for each machine with the desired set of teeth and spacing-blocks, and when a book of a different index from the one previously cut is to be madethe rack may be changed easily for this work.

In Fig. 8 I have illustrated a stop-block for checking the forward movement of the table at any predetermined point. Upon the inner side of the rack adjacent to the bell-crank lever B, I have made a series of screw-holes (4 which are to be engaged by thumb-screws kit, and have provided a block H, which has a longitudinal slot 7L3 upon one end to be slipped over the thumb-screws it it. Block H carries a stud it", which projects outward so as to contact the bell-crank lever B in the travel of the carriage. The thumb-screws it it may be placed in any two adjacent holes of the series a, and then by regulating the position of the block upon the set-screws the point at which the feed of the table will be stopped can be regulated to a nicety, so as to set the machine for cutting various-sized books, since when the stud it contacts the bell-crank lever B While the cam may continue to allow the arm 5" to be carried inward the stud [L4 prevents the carriage from moving forward.

' What I claim is- 1. A rack for index-cutting machines consisting of a bar having a longitudinal groove therein, a series of independent teeth having bases to seat in the groove and a series of independent srmcing-blocks having bases to seat in the groove and means for clamping the basesof the teeth and of the blocks in the groove.

2. A rack for index-cutting machines consisting of a bar having a longitudinal Way out therein, a longitudinal key seated in the way, independent teeth in the way and set-screws for engaging the key and clamping the teeth in the way.

3. A rack for index-cutting machines consisting of a barhaving a longitudinal inwardlyfiaring groove. independent teeth havingsimilarly-flared bases for engaging the groove, spacing-blocks having similar bases for engaging the groove and means for clamping the teeth and the blocks in the groove.

4. A rack for index-cutting machines having a series of perforations upon its side, a bell-crank lever carrying a pawl for engaging the rack, thumb-screws for engaging the perforations, and a block slotted for adjustment upon the screws and carrying a stud to engage said lOVGl'LO limit the travel of the rack.

JOHN J. BURKE.

\Nitnesses:

W. F. MURRAY, A. MoCoRMAok. 

